Johannes Roessner is the founder of batch2 engineering, specializing in advanced battery testing systems that enable smarter, safer, and more efficient energy solutions. With over 15 years of experience in battery development, he has worked across the entire value chain — from cell diagnostics to pack design. A graduate of the Technical University of Munich, Johannes combines deep technical expertise with a passion for innovation in sustainable energy. As a podcaster on hydrogen and battery technologies, he contributes actively to shaping the dialogue on Europe’s energy transition and next-generation battery safety.

batch2 engineering provides technical consulting for the hydrogen and battery industries. The company supports clients in planning, designing, and commissioning test laboratories and individual test benches for battery and hydrogen applications. Its expertise includes guidance on market access and certification strategies, as well as tailored test program management aligned with relevant regulations, codes, and standards. batch2 engineering also advises on hydrogen and battery safety, conducts product- and system-level technical due diligence, and offers coaching and training on regulatory frameworks, norms, and market entry requirements.